Trurlia, Jaloszynski, 2009

Jałoszyński, Paweł, 2019, Four new Oriental species of the ‘ Cephennomicrus group’ (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4679 (3), pp. 553-562 : 559-561

Trurlia nova sp. n.

( Figs 4 , 19–22 )

Type material. Holotype: E MALAYSIA (Sarawak): ♂, two labels: "E MALAYSIA: Sarawak / confl. Suan Oyan and / Mujomg riv., E.Kapit / 150m, 19.V.1994. # 6a / Löbl & Burckhardt" [white, printed], " TRURLIA / nova m. / P. Jałoszyński, 2019 / HOLOTYPUS " [red, printed] ( MHNG).

Diagnosis. BL ~ 1.3 mm; anterior pronotal corners thickened but weakly projecting anterad; glandular openings slightly behind middle of pronotum; aedeagus very slender, bullet-shaped, with apex subtriangular with rounded sides; endophallus with lightly sclerotized median tubular structure with proximal end broadened; each paramere with three setae of similar length (one apical and two subapical ones).

Description. Body of male ( Fig. 4 ) stout, strongly convex, uniformly dark reddish brown, appendages only indistinctly lighter; setae slightly lighter than cuticle; BL 1.33 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.20 mm, HW 0.35 mm; vertex and frons confluent, unmodified, together weakly, evenly convex; supraantennal tubercles small and weakly elevated, but well-defined. Punctures small but sharply marked, dense; setae very short and recumbent, sparse. Antennae slender, with large club, AnL 0.45 mm, antennomeres I–II elongate, III–IX indistinctly elongate, club (composed of fused antennomeres X + XI) oval and flattened dorso-ventrally, nearly twice as long as broad.

Pronotum subtrapezoidal, broadest slightly behind middle; PL 0.43 mm, PW 0.60 mm; anterior margin broadly rounded; anterior corners well-defined, thickened, slightly projecting anterad; lateral margins distinctly serrate, strongly rounded in anterior third and weakly so posteriorly, weakly convergent toward nearly right-angled poste- rior corners; posterior margin shallowly bisinuate at sides and additionally weakly concave in front of scutellum. Pronotal base with one, inner pair of small pits connected by a groove composed of two anteriorly convex arcs connected at middle. Pronotal disc densely covered with distinct, sharply marked punctures slightly larger than those on frons and vertex; lateral glandular openings oval, behind middle of pronotum; basic vestiture composed of very short, sparse and recumbent setae, additionally pronotum with five pairs of macrosetae: one pair in front of scutellum, one lateral seta in front of each hind corner, one slightly mesad and one slightly anterad each glandular opening, and one near each anterior corner.

Elytra together oval, broadest slightly in front of middle; EL 0.70 mm, EW 0.70 mm, EI 1.00; humeral lines carinate, sharply marked, extending from humeral denticle to middle of elytral length; elytral apices separately rounded. Punctures on elytra smaller and sparser than those on pronotum, but distinct, sharply marked; basic vesti- ture similar to that on pronotum, each elytron with 18 dorsal and lateral macrosetae.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 19–22 ) very slender; AeL 0.38 mm; median lobe in ventral view bullet-shaped, its apical region subtriangular with rounded sides; endophallus with lightly sclerotized median tubular structure with proximal end broadened; each paramere with three setae of similar length, one apical and two subapical ones.

Female. Unknown.

Distribution. East Malaysia: southern Sarawak.

Etymology. The Latin adjective nova (fem. singular of novus) means "new".

Remarks. All species of this genus are externally very uniform and the aedeagus must be examined to identify them. The aedeagus of Trurlia nova is slenderer than that of any remaining species of this interesting genus; it re- sembles the aedeagi of T. acutangula Jałoszyński, 2011 and T. constricta Jałoszyński, 2011 , but the apical portion of the median lobe and the endophallic structures have clearly different shapes. Moreover, the parameres in T. nova have three long apical and subapical setae, whereas in T. acutangula and T. constricta there are two long setae, and one much shorter.

Figures

FIGURES 1–6. Dorsal habitus of holotypes (1–4), head in dorsofrontal view (5), head and pronotum in dorsal view (6). Ce- phennococcus penangensis sp. n. (1); Cephennomicrus matangensis sp. n. (2, 5–6); Cephennomicrus selangorensis sp. n. (3); Trurlia nova sp. n. (4). Abbreviations: abg, antebasal groove; abp, antebasal pit.

FIGURES 15–22. Aedeagus in ventral (15, 17, 19, 21) and lateral (16, 18, 20, 22) views. Cephennomicrus selangorensis sp. n. (15–18); Trurlia nova sp. n. (19–22).